Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance, used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all the writes will reach the memory.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance,
    used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached
    memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow
    and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all
    the writes will reach the memory. (CVE-2023-34321)

  - For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in
    shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run
    directly the respective shadow page tables. For 64-bit PV guests this means running on the shadow of the
    guest root page table. In the course of dealing with shortage of memory in the shadow pool associated with
    a domain, shadows of page tables may be torn down. This tearing down may include the shadow root page
    table that the CPU in question is presently running on. While a precaution exists to supposedly prevent
    the tearing down of the underlying live page table, the time window covered by that precaution isn't large
    enough. (CVE-2023-34322)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance,     used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached     memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow     and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all     the writes will reach the memory. (CVE-2023-34321)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote host is affected by the vulnerability described in GLSA-202409-10 (Xen: Multiple Vulnerabilities)

    Multiple vulnerabilities have been discovered in Xen. Please review the CVE identifiers referenced below     for details.

Tenable has extracted the preceding description block directly from the Gentoo Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 39 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-35d2ad2328 advisory.

    arm32: The cache may not be properly cleaned/invalidated [XSA-437,     CVE-2023-34321]     top-level shadow reference dropped too early for 64-bit PV guests     [XSA-438, CVE-2023-34322]     x86/AMD: Divide speculative information leak [XSA-439, CVE-2023-20588]

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 37 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-948136565a advisory.

    arm32: The cache may not be properly cleaned/invalidated [XSA-437,     CVE-2023-34321]     top-level shadow reference dropped too early for 64-bit PV guests     [XSA-438, CVE-2023-34322]     x86/AMD: Divide speculative information leak [XSA-439, CVE-2023-20588]

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-4125279976 advisory.

    arm32: The cache may not be properly cleaned/invalidated [XSA-437,     CVE-2023-34321]     top-level shadow reference dropped too early for 64-bit PV guests     [XSA-438, CVE-2023-34322]     x86/AMD: Divide speculative information leak [XSA-439, CVE-2023-20588]

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Arm cache may not be properly cleaned or invalidated due to an arithmetic overflow flaw.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version   number.

ID	Name	Product	Family	Severity
424695	Alpine: multiple xen packages: security update to 4.17.2-r1	Tenable Cloud Security	Alpine Linux Local Security Checks	high
424695	Alpine: multiple xen packages: security update to 4.17.2-r1	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
226296	Linux Distros Unpatched Vulnerability : CVE-2023-34321	Nessus	Misc.	low
207559	GLSA-202409-10 : Xen: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	high
185221	Fedora 39 : xen (2023-35d2ad2328)	Nessus	Fedora Local Security Checks	high
407853	Alpine: xen: security update to 4.17.2-r1	Tenable Cloud Security	Alpine Linux Local Security Checks	high
407853	Alpine: xen: security update to 4.17.2-r1	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
407844	Alpine: xen: security update to 4.16.5-r1	Tenable Cloud Security	Alpine Linux Local Security Checks	high
407844	Alpine: xen: security update to 4.16.5-r1	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
407825	Alpine: xen: security update to 4.15.5-r1	Tenable Cloud Security	Alpine Linux Local Security Checks	high
407825	Alpine: xen: security update to 4.15.5-r1	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
182947	Fedora 37 : xen (2023-948136565a)	Nessus	Fedora Local Security Checks	high
182399	Fedora 38 : xen (2023-4125279976)	Nessus	Fedora Local Security Checks	high
180575	Xen arm32: The cache may not be properly cleaned/invalidated (XSA-437)	Nessus	Misc.	low

Detections

Analytics

CVE-2023-34321

low

Tenable Plugins

high

high

low

high

high

high

high

high

high

high

high

high

high

low